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40
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Text
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<a href="http://doi.org/10.1111/j.1532-5415.1992.tb01957.x" target="_blank" rel="noreferrer noopener">http://doi.org/10.1111/j.1532-5415.1992.tb01957.x</a>
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Pages
666-672
Issue
7
Volume
40
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Title
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EFFECTS OF ADVANCING AGE ON THE EFFICACY AND SIDE-EFFECTS OF ANTIARRHYTHMIC DRUGS IN POSTMYOCARDIAL INFARCTION PATIENTS WITH VENTRICULAR ARRHYTHMIAS
Publisher
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Journal of the American Geriatrics Society
Date
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1992
1992-07
Subject
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attack trial experience; Geriatrics & Gerontology; suppression; therapy
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Akiyama T; Pawitan Y; Campbell W B; Papa L; Barker A H; Rubbert P; Friedman L; Keller M; Josephson R A
Description
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Objective: To determine the effect of age on the response to anti-arrhythmic drugs. Design: Randomized controlled trial comparing particular drugs. Setting: Multi-institutional (The Cardiac Arrhythmia Suppression Trial, CAST). Participants: 2,371 patients, age <80, with ventricular arrhythmias after a recent myocardial infarction. Subjects classified by age as less-than-or-equal-to 55, 56-65, and 66-79 years. Intervention: Upwardly titrated doses of encainide, flecainide or moricizine. After identification of a tolerated and effective dose of one of the drugs, participants were randomized to that drug and dose versus its placebo for up to 10 months. Main Outcome Measures: Efficacy of drug (suppression of ventricular premature depolarizations and/or non-sustained ventricular tachycardia), side effects and mortality. Results: Older patients had more previous MIs, congestive heart failure (CHF), hypertension, NSVT, repolarization abnormalities, digitalis use, and diuretic use. They had less pathologic Q-waves or electrocardiographic injury pattern, and their left ventricular ejection fraction (LVEF) was lower. First dose VPD suppression with the first drug averaged 53% and is not associated with age (P = 0.29). Adverse events including death are more frequent in older patients taking study drugs (P < 0.001). This trend is consistent in all three study drugs and at varying LVEFs. History of prior MI, low LVEF, VPD (in log scale), and digitalis therapy also correlates with adverse events (all P < 0.05). Following adjustment for these factors, older age is an independent predictor of adverse events (relative risk 1.30 per decade of age, P < 0.001). Conclusions: Older age increases the susceptibility to adverse cardiac events from a class of relatively toxic antiarrhythmic agents.
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<a href="http://doi.org/10.1111/j.1532-5415.1992.tb01957.x" target="_blank" rel="noreferrer noopener">10.1111/j.1532-5415.1992.tb01957.x</a>
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Journal Article or Conference Abstract Publication
1992
Akiyama T
attack trial experience
Barker A H
Campbell W B
Friedman L
Geriatrics & Gerontology
Josephson R A
Journal Article or Conference Abstract Publication
Journal of the American Geriatrics Society
Keller M
Papa L
Pawitan Y
Rubbert P
suppression
therapy